try this peice of code

The buffer from parent will be flushed all before the child will be called.

int main(void) {

int i;
pid_t pidp;

for (i=0;i<4;i++) {
switch (pidp=fork()) {
case -1:
fprintf(stdout, "Error during fork.\n");
fflush(NULL);
exit (1);
case 0:
fprintf(stdout, "From child: I am born.\n");
fflush(NULL);
exit (0);
default:
fprintf(stdout, "From parent: Child %d has ID %d.\n", i+1, pidp);
fflush(NULL);
}
}

exit(0);
}

rajesh